Hello,
I applied these commands:
fdtput --type s /boot/dtb-4.12.13-300.fc26.armv7hl/bcm2837-rpi-3-b.dtb
/soc/spi@7e204000 status "okay"
fdtput --type s /boot/dtb-4.12.13-300.fc26.armv7hl/bcm2837-rpi-3-b.dtb
/soc/spi@7e215080 status "okay"
fdtput --type s /boot/dtb-4.12.13-300.fc26.armv7hl/bcm2837-rpi-3-b.dtb
/soc/spi@7e2150c0 status "okay"
And now I see spi_bcm2835 and spi_bcm2835aux modules started, after the
reboot. But I can't see my /dev/spi* devices.
Do you have an idea of the missing step?
[root@raspchr-fed26 device-tree]# dmesg | grep spi
[ 93.646629] spi-bcm2835 3f204000.spi: no tx-dma configuration found -
not using dma mode
[root@raspchr-fed26 device-tree]#
I still see other devices:
./soc/gpio@7e200000/spi0_gpio35
./soc/gpio@7e200000/spi0_gpio7
./soc/gpio@7e200000/spi1_gpio16
./soc/gpio@7e200000/spi2_gpio40
Do I need to activate them ?
Thanks for your help.
Christophe.
2017-09-16 22:53 GMT+02:00 christophe pages <pageschrist(a)gmail.com>:
Thanks for your answer, Yes I added these 2 lines in the config.txt
file
like for the raspbain .
So What do I have to do with the dtb files. I see nothing regarding the
spi.
Do I still have to use the config.txt file ?
Thanks for your help.
2017-09-16 14:57 GMT+02:00 Peter Robinson <pbrobinson(a)gmail.com>:
> On Sat, Sep 16, 2017 at 1:33 PM, christophe pages <pageschrist(a)gmail.com>
> wrote:
> > Hello,
> > I try to activate the spi on my raspberry3 using a fedora 26.
> > I tried these options:
> > device_tree_param=spi=on
> > dtoverlay=spi-bcm2708
>
> Did you add that to config.txt? That way of doing it is specific to
> Rasspian, the driver in Fedora is the upstream driver which is
> spi-bcm2835aux and you'll need to either edit the dtb to enable it or
> use a DT overlay as it's disabled by default.
>
> > I use this kernel:
> > 4.12.5-300.fc26.armv7hl
> >
> > I see that the support in kernel seems already inside:
> > CONFIG_SPI=y
> > # CONFIG_SPI_DEBUG is not set
> > CONFIG_SPI_MASTER=y
> >
> >
> > But I never see the devices /dev/spi* appearing.
> > I can't see any messages regarding spi in dmesg.
> >
> > I tested with a raspbian and I see them correctly.
> > I think I miss somethiing.
> > Could you help.
> > Thanks.
> >
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> >
>